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Finding the Fourth Proportional to 651.61, 899.20 and 356.87

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Solution

The fourth proportional to 651.61, 899.20 and 356.87 is: 492.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    651.61 : 899.20 = 356.87 : x
  2. Step 2: Convert to fraction form
    651.61/899.20 = 356.87/x
  3. Step 3: Cross multiply
    651.61x = 899.20 × 356.87
  4. Step 4: Simplify right side
    651.61x = 320,898.86
  5. Step 5: Solve for x
    x = 320,898.86/651.61
  6. Step 6: Final answer
    x = 492.47

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.